﻿<p>An <i>IfcAlignment2DHorizontal</i> is a linear reference projected onto the horizontal x/y plane. Points along a horizontal alignment have two coordinate values, x and y in the local Cartesian engineering system.</p>
<p>The horizontal alignment is defined by segments that are connected end-to-start. The transition at the segment connection is not enforced to be tangential, if the “tangential continuity” flag is set to false, otherwise a tangential continuity shall be preserved. Based on the context of the project, they are geo-referenced and convertible into Northing and Easting values.</p>
<blockquote class="note">NOTE&nbsp; Georeferencing is provided by <i>IfcMapConversion</i> through the <i>IfcGeometricRepresentationContext</i> defined at <i>IfcProject</i>.</blockquote>